Over the past five days, Railway has experienced numerous concentrated Distributed Denial of Service (DDoS) attacks, two of which resulted in end user impact. After Railway Engineering identified that it was related to prior hostile traffic and a DDoS, at 18:59 UTC, we attempted to roll out a previous mitigation that had resolved a previous DDoS affecting only the Railway API. Many hostile actors attack Railway and many of those attacks either get neutralized from automated systems or platform mitigations.